# 序列相关方法
str = "112233445566778899"
flage = "1" in str
print(flage)
flage = ("1" not in str)
print(flage)
str2 = "123456"
str3 = str + str2
print(str3)
str4 = str3 * 3
print(str4)
length = len(str)
print(str[length - 1])
str5 = str[1:2:3]
print(str5)
a1=min(str)
a2=max(str)
a3=str.index("1")
a4=str.count("2")
print(a1)
print(a2)
print(a3)
print(a4)